Phoenix Mars Microphone – Turning on the Robot’s Ear!
LiveScience

Listen up…to Mars!
Word from the trenches is that the Phoenix lander team is going forward with turning on the spacecraft’s microphone. Phoenix, like the lost-to-Mars 1999 Polar Lander, carried a tiny microphone to hear the sounds of the descent to the red planet.
The microphone is part of the Mars Descent Imager (MARDI) system built by Malin Space Science Systems, but for Phoenix was turned off due to the small risk that it could trip up a critical landing system.
But the go-ahead has been given to turn the microphone on, right there on-the-spot at the Phoenix Martian polar north landing spot. Other good news is that NASA has given the lander an extended lease on life for an additional two months – into November.